William odgers



(No Model.)

W. ODGERS.

DIAMOND ROCK DRILL@ No. 369,654. Y Patanted Sept. 6, 1887.

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my www v o A2, thus providing a thrust-bearing.

ILLIAM ODGERS, OF BONNE TERRE, MISSOURI, ASSIGNOR OF ORE-HALF TO ROBERTTETTEY, OF SAME PLACE.

DIAMOND ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 369,654` datedSeptember 6, 1887.

Application filed June 28, 1886. Serial No. 206.423.

To all whom, it may concern..-

Beit known that I, WILLIAM ODGERs, of Bonne Terre, in the county of St.Franois and State of Missouri, have invented a certain 5 new and usefulImprovementin Diamond Rock-Drills, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, and in which- Io Figure lis an elevation of my improved drill, showing only part of the centralportion of the shaft. Fig. 2 is a like view showing the lower part ofthe shaft with the bit attached and showing the feed out of gear, it

[5 being shown in gear in Fig. l. Fig. 3 is a transverse section takenon line 3 3, Fig. l.

Fig. 4 is a similar View taken on linelc 4, Fig.

1. Fig. 5 is a longitudinal section taken on line 5 5, Fig. 1, showingthe upper portion of the shaft, but not the extreme upper end of it.

Fig. 6 is a detail view illustrating the thrustbearing.

My invention relates to certain improve ments in diamond drills; and myinvention 2 5 consists in features of novelty,hereinafter fullydescribed, and pointed out in the claims.

Referring to the drawings, A represents the frame of the drill. Brepresents the main driving-shaft, provided with a master-wheel, G,meshing into a pinion, D, on the sleeve D'. Through this sleeve passesthe hollow shaft E of the drill, as shown, the two being connected byspline, or feather and groove, as usual, so that the turning of theshaft B will cause a continuous revolution or turning of the shaft E.Upon the lower end of the shaft E is the ordinary bit, F, secured to theshaft by a chuck, F', as usual.

The frame A is provided with end journallo boxes, A', as usual, and inaddition to these bearings lI provide a central journal-box, A2, throughwhich the sleeve D passes, the part of the frame A to which the box A2is secured being hinged to the other part at A2, and secured at theother side by a clamp or bolt, A4. By removing the clamp A" the framemay be opened out to permit the master-wheel to be put on, dtc. Thesleeve D' has a groove, D2, and

collar D3, connection with the frame and box (See end of the sleeve D'.

(No model.)

Figs. 5 and 6.) This central bearing for the sleeve and the shaft thatpasses through it adds materiallyto the strength and durability of thedrill.

G represents the feed, consisting of a serewthreaded sleeve fitted onthe correspondingly screwthreaded shaft E beneath the sleeve D',

and preferably entering atits upper end within Y an annular groove, D4,formed in the lower Within this groove D4, and between the lower end ofthe sleeve D and the upper end of the feed-sleeve G, is a friction-ring,H,which (when it becomes worn) may be taken out and replaced by another.The feed-sleeve may be operated to cause the movement ofthe drillbytheordinary methodthat is, by differential. gearing consist-ing of pinion Ion one end of the sleeve D', meshing into a pinion, J', on a shaft, J,journaled in the frame A, the shaft being provided with a 70 pinion, J2,meshing into a pinion, G', on the sleeve G. One of these pinions,preferably that J2, has one or two cogs more than the pinion into whichit meshes, which causes a slower revolution of the sleeve G than therevolution of the sleeve D', which gives the feed, the friction ring ordisk H acting as a bearing between the sleeve G and sleeve D'.

The shaft J may be moved to disengage the pinions from the positionshown in Fig. l to so that shown in Fig. 2. This movement is made bymeans of a lever, L, pivoted at L' to the frame, and which is held toeither adjustment by a rack, L2, and clamp L3.

Another method of producing the feed is 8: by means of a brakeconsisting of a strap, M, u secured at M' to the frame of the machine,and which passes around the sleeve G, and is secured at its other end toa sliding block, M2, held in a recess, M3, of the frame,which is con- 9cnected by a rod, M, to a handlever, M5. It will thus be seen that bypulling on the handlever M5 the brake will be tightened on the sleeve G,preventing its turning as rapidly as ghe sleeve D', thus causing thefeed of the 95 rill.

I claim as my invention- Vl. The combination, with the externallyscrew-threaded drillshaft, a sleeve surrounding it and connectedltherewith by a splineand Ico groove, and bearings for holding saidsleeve against endwise movement, of a second sleeve internallyscrew-threaded and tted on said shaft, means for holding said sleeveagainst endwise movement, and a friction-brake for retarding itsrotation, substantial ly as set forth.

2. In a diamond drill, in combination with the drill-shaft, the sleevethrough which the shaft passes, and frame provided with end and centralbearings for the sleeve, the frame being made in two parts hingedtogether, substantially as set forth.

3. In a diamond drill, in combination with a frame, the drillshaft,sleeve surrounding the shaft and by which the shaft is turned,

feed-sleeve, and friction-ring placed between the said sleeves,substantially as and for the purpose set forth. v

4. In a diamond drill, in combination with a frame, the drill-shaft,sleeve through which the shaft passes and by which it is turned,

feed-sleeve through which the shaft passes, iiange on the lower end ofthe driving-sleeve within which the upper end of the feed-sleeve fits,and friction-ring between the said sleeves, substantially as set forth.

5. lIn a diamond drill, in combination with the frame, the drill-shaft,sleeve through which the drill-shaft passes and by which it is turned,feed-sleeve, and brake for acting upon the feedsleeve to produce thefeed, substantially as set forth.

6. In a diamond drill, in combination with a frame, the drill-shaft,sleeve through which the drillshaft passes and is turned, and brake forretarding the movement of the feed-sleeve, consisting of a strap,sliding block, connectingrod, and lever, substantially as set forth.

WILLIAM ODGERS.

In presence of- F. DEsLoGE, J No. M.y DEsLoGE.

